Walk through just about any Hi-Fi retailer and before too long you're sure to come across a huge section bursting with personal audio gear. There seem to be headphones and earphones for every taste and budget, including wired and wireless units and models that offer just that little bit extra. So how does a newcomer to the headphones game make a splash in what would appear to be a very well stocked marketplace? Say hello to the Soundsight cans, which are billed as the world's first video recording smart headphones.